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Author Topic: Pal 60hz Mode  (Read 125 times)

total_ass

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Pal 60hz Mode
« Reply #45 on: August 26, 2004, 04:44:00 AM »

earlier on in this topic someone mentioned messing with one of the pins on the scart cable. can someone explain this further please.
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Chancer

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Pal 60hz Mode
« Reply #46 on: August 26, 2004, 04:53:00 AM »

QUOTE
One thing you can try is to snip the wire going to pin number 8 on the SCART end of the cable. This pin controls aspect ratio and may have an adverse effect on your TV (the same goes for the Gamecube cable).


If so don't bother messing with it as the info is not correct. Pin 8 enables automatic switching to the AV channel on the TV it has absolutely nothing to do with controling the aspect ratio and will not solve your problem.
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total_ass

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« Reply #47 on: August 26, 2004, 04:56:00 AM »

ok thanks dude. so there is no hope whatsoever? its just that when you look at 60hz mode, then look at 50hz mode again, you realise how shit it really is.
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total_ass

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« Reply #48 on: August 26, 2004, 07:21:00 AM »

sad.gif
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Chancer

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« Reply #49 on: August 26, 2004, 09:59:00 AM »

QUOTE
Yes Chancer Pin no. 8 does enable automatic AV switching, but where consoles are concerned, I can testify that it can also causes problems with 16:9 mode on 4:3 compatible sets

Sorry makes absolutely no difference to the aspect ratio switching wether its connected to a console or not. the pin 8 control is determined in the TV if it detects the input (only a voltage) from any equipment on pin 8 it switches to the relevant scart channel that the equipment is plugged into, the aspect ratio is not altered except in the following example.
The only time you would see a difference is if your widescreen TV has an Auto mode for the aspect ratio and you had say been watching the tV on a 4:3 mode and switched on the console which was set to 16:9. this would obviously then cause the set to switch to 16:9 because of the wide screen signal but nothing to do with pin 8.
If you want or anyone is interested i can post the circuit description for the scart switching set up. Yes I see it all the time I repair TV and home electronics for a living, so whatever is altering your aspect its nothing to do with pin8
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Chancer

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« Reply #50 on: August 27, 2004, 03:30:00 AM »

QUOTE
total_ass just confirmed what I have said in his last post

No he did not what he is seeing is nothing to do with aspect ratios at all. 16:9 or 14:9 or 4:3 is the same aspect ratio and size wether you have PAL or NTSC
The picture size is different because fo the difference in the field flyback rate. His TV does not support this rate correctly so the picture is displayed overscanned.

QUOTE
You are not offering a viable alternative to cutting pin 8, and for clarification we are talking about pin 8 on the cable and not in the set.

I know you mean pin 8 in the cable, where do you think the voltage on pin 8 is fed to THE TV and it is the TV that switches to AV when it has an input voltage of 5V or greater on pin 8. the consolde does not send any special data via pin 8. Auto widescreen switching is done dependant on the incoming video signal not via pin 8. Your set changes channel the set detects a different video signal coming in and if the tV is set Auto aspect changes the aspect ratio. IF the TV is set in 16:9 or 4:3 the aspect will not alter.

The only viable alternative unfortunately to the guy is replace the TV. His Tv is a Turkish chassis design by Vestel and as such is a budget TV that simply does not support the mode he wishes to run the TV in

I hope I have explained it easy enough,as going into how the aspect ratio is switched would bore veryone here and take a lot of space
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Chancer

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« Reply #51 on: August 27, 2004, 01:13:00 PM »

[/QUOTE]Perhaps you have had no personally experience with TVs that behave like this
Quote
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total_ass

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« Reply #52 on: August 27, 2004, 01:22:00 PM »

there is no point now, as i can just hit AV to change to the RGB channel which already has the aspect ratio set. if i cut pin 8 i will still have to hit AV for it to go to the AV-RGB channel.
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Chancer

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« Reply #53 on: August 28, 2004, 07:06:00 AM »

QUOTE
Please humor me for a moment, if I came to you as a customer and told you that everytime I turned on my Xbox or PS2, my 4:3 TV changes from 4:3 to 16:9 mode/wide/letterbox (whatever you prefer to call it). What would you advise me to do

First of all make sure you have the console set to the correct aspect ratio for your TV.  Second if you have a 4:3 Tv set not many have the option of switching to 16:9 and certainly do not do this  this automatically.
This is pointless you clearly do not understand how the aspect ratio is automatically selected on a Widescreen TV, despite your play on phrases or words used. here is how it is.
1. 4:3 TV sets do not have Auto aspect switching. If you reckon yours does post the make and model number on here. Some Sony and Hitachi inparticular have a button that says 16:9 which gives a psuedo widescreen effect by reducing the frame scan so the picture appears widescreen but with huge black bands top and bottom.
2. Pin 8 is not a data pin that controls or affects aspect ratio. Pin 8 has the same function be it with a console or a DVd or whatever it is connected to. What the TV does when it detcts voltage from pin 8 is identical no matter if its a video console or whatever plugged in.
3 On a widescreen TV that has Auto aspect switching. If you switch the tV aspect to Auto it detects the aspect signal from the incoming video signal not from pin 8. If you switch on your console DVD whatever on pin 8 will cause the TV channel to change and select the scart input. The incoming video signal is detected and if that signal contains the aspect information the TV will change to that aspect. If you cut pin 8 you will have to manually select the AV channel. The video signal that contains the aspect information signal is still there so the Tv will switch to that aspect.
Now Humour me:
I have on the bench at the moment a panasonic TX28WR4DP I set the aspect to AUTO. I connected a V1.4 Xbox I have just chipped and set up the console for widescreen. Switched all off powered on the TV then the Xbox. The tV switched to display Av1 which about a second later was followed by the word WIDE in the top left corner. I switched back to BBC1 turned off the console and chopped pin 8 from the RGB cable (The cable is stuffed but I buy them at £2 so no problem)
I switch on the Xbox and the channnel on the TV stays on BBC1. I switch manually to AV1 the Xbox pixture comes up and guess what Wide is diplayed in the top left hand corner.
Now as you just stated
QUOTE
Because we both know that AV channel switching is not the only duty and result of pin 8.

Explain why the TV switched to Wide with no pin 8 connected
Explain how Pin 8 can carry a data signal to control widescreen switching without a modulated carrier signal down that pin or a link to the video information to pick up the aspect signal.
Don't forget the model of the TV you are experiencing this on.
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fahrenheit

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« Reply #54 on: August 28, 2004, 07:34:00 PM »

smile.gif

My set is a Loewe Profile Plus 3472. It is 50Hz. The problem as I have stated is that 16:9 mode has been engaged on my set, with all my consoles when powering up. I would then manually have to change back to 4:3. If I chose to change channels, then change back to the RGB SCART's AV channel, the set would engage its 16:9 mode again and I would be forced to manually adjust back to 4:3.
Because of poor design on the remote and menu, changing between modes is a chore. So I found that removing pin 8 in my case has made life easier because now all that is required is for me to change manually to the SCART AV channel
(which it stays on most of the time) and it will remain in the 4:3 mode whenever I change channels and back again.

It does not equate to auto aspect ratio switching, it could just be an idiosyncrasy of my set (and the other couple of sets that I have experienced that do this). I believe in my case whether by intention of design, or by fault, it is the sets response to the voltage on pin 8.
There is also for me the issue of my increase in brightness, that disappears once the set is returned to 4:3. I have no explaination as to why my set does it and perhaps it is another idiosyncrasy or fault, but removal of pin 8 from the equation makes it a none issue for me.

DarkLegion you are correct, it doesn't matter in the context of the original question and I made the mistake of suggesting it, though it would be good for him to know when purchasing a new TV.
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bompy

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« Reply #55 on: September 23, 2004, 06:12:00 AM »

QUOTE (Chancer @ Aug 27 2004, 11:33 AM)
No he did not what he is seeing is nothing to do with aspect ratios at all. 16:9 or 14:9 or 4:3 is the same aspect ratio and size wether you have PAL or NTSC
The picture size is different because fo the difference in the field flyback rate. His TV does not support this rate correctly so the picture is displayed overscanned.

is there any way to get rid of this overscanned image? I tryed both cable types, RGB or AV, whenever I set the xbox on PAL60 I get, indeed, an overscanned image. Another thing I observed, when I start xbox and the picure is set to "Pixel Plus" the screen will flicker as the refresh rate is to low, and... on Digital menu are only two options "Progressive scan" and "Double line" or smth... I should mention that the normal options in the digital menu are "100 Hz Digital Scan", "Pixel plus" and Double sided lines".

I have a 16:9 PhilipsTV 32pw9527.
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